本研究利用thermal CVD法於成長氧化鋅的同時摻雜入鈷原子，以形成高方向性的稀釋型磁性半導體Zn1-xCoxO奈米柱。藉由改變裝盛Co有機金屬化合物器皿的大小及其加熱溫度，皆可成功地調節鈷於氧化鋅奈米柱中含量之大小。由XRD及TEM結構分析得知，Zn1-xCoxO (x＜11.2%)奈米柱具有單晶的wurtzite結構，且沒有任何鈷或氧化鈷的相分離產生。經由超導量子干涉儀量測Zn1-xCoxO (x＜8.7%)奈米柱磁性，顯示其在室溫下具有鐵磁特性，且居禮溫度大於350K。而利用UV-Vis吸收光譜量測成長之Zn1-xCoxO奈米柱，顯示其在可見光區是透明的且其能隙隨鈷含量的增加有紅位移的情形出現。另外本研究也發現經由改善氧化鋅之結晶品質，可有效地提升Zn1-xCoxO奈米柱之鐵磁特性。

　　Well-aligned Zn1-xCoxO nanorods have been grown by in-situ doping of Co in ZnO nanorods using a thermal chemical vapor deposition method. Co contents in the Zn1-xCoxO nanorods are adjustable by varying the diameter of the Co source container and the vaporing temperature of the Co organo-metallic precursor. Structural analyses indicated that the Zn1-xCoxO (x＜11.2%) nanorod possesses the single crystalline wurtzite structure and there is no segregated cluster of impurity phase appearing throughout the nanorod. Room-temperature ferromagnetism in the Zn1-xCoxO (x＜8.7%) nanorods is observed and a Curie temperature higher than 350K is obtained in the nanorods. In addition, the ferromagnetic properties of the Zn1-xCoxO nanorods have been shown strongly dependent on the quality of nanorods. The transparence of the Zn1-xCoxO nanorods in the visible region has been examined by uv-visible absorption. Red-shifted of the fundamental absorptions relative to that of the pure ZnO nanorods is observed in the Co-doped ZnO nanorods.

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